I think it's a pure racing incident and poor judgment on both drivers' part. The overhead shot is much clearer than the front shot. Nico shouldn't have moved over so far right, but being the leader he is entitled to. Lewis is not yet alongside Nico when Nico started moving right, so he should have backed off and moved left (making the initial right a dummy move), and that would've been easy pass round the outside. Unfortunately he got caught out because he expected Nico to give him room (which is unlikely, and he should have expected that by now because of past history). More importantly, there's no need to risk it so early in the race. This would've been a classic incident in a Gran Turismo online race, but I expected better from 2 experienced F1 drivers.
On another note, since the FIA put an age limit on the superlicense, does this mean any record Max set in this race is going to be unbroken forever?